In addition to any other powers, any agency, commission, or board provided for by joint powers agreement entered into by cities pursuant to Article 1 (commencing with Section 6500) and created in a county of the fifth class, as determined by Section 28020, may issue revenue bonds pursuant to this article to pay all or part of the cost and expenses of acquiring, constructing, or improving, facilities for the collection, treatment or disposal of sewage, waste, or stormwater, provided that entity has the power to construct, maintain, or operate the facilities.